The woman was freed at 9.10am but a jack had to be used to lift up the carriage and help free her foot safely, according to a TfL spokesperson.

And a London Ambulance Service spokesman said: "We sent a number of resources including an ambulance crew, an incident response officer, an advanced paramedic, and our hazardous area response team to the scene. The first of our medics arrived within six minutes.

"Our paramedics treated a woman at the scene for a minor leg injury but she was not taken to hospital."

Meanwhile, passengers took to Twitter to describe the chaos at the station.